Search Exception

jnadler · **Posted:** Sun Apr 04, 2010 5:12 pm

My app was working perfectly until I upgraded to 3.2.0.Beta1, now I'm seeing the exception below. What's odd is that the process I'm running is inserting (not deleting) records, and from this stack trace it appears that Search is trying to remove entities from the index:

Code:

Exception in thread "pool-2-thread-11" org.hibernate.search.SearchException: Unable to remove class com.attensa.core.entity.Article#null from index.
   at org.hibernate.search.backend.impl.lucene.works.DeleteWorkDelegate.performWork(DeleteWorkDelegate.java:83)
   at org.hibernate.search.backend.impl.lucene.PerDPQueueProcessor.run(PerDPQueueProcessor.java:93)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
   at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
   at org.apache.lucene.index.Term.hashCode(Term.java:89)
   at org.apache.lucene.search.TermQuery.hashCode(TermQuery.java:176)
   at org.apache.lucene.search.BooleanClause.hashCode(BooleanClause.java:108)
   at java.util.AbstractList.hashCode(AbstractList.java:527)
   at org.apache.lucene.search.BooleanQuery.hashCode(BooleanQuery.java:466)
   at java.util.HashMap.put(HashMap.java:372)
   at org.apache.lucene.index.DocumentsWriter.addDeleteQuery(DocumentsWriter.java:1021)
   at org.apache.lucene.index.DocumentsWriter.bufferDeleteQuery(DocumentsWriter.java:874)
   at org.apache.lucene.index.IndexWriter.deleteDocuments(IndexWriter.java:1990)
   at org.hibernate.search.backend.impl.lucene.works.DeleteWorkDelegate.performWork(DeleteWorkDelegate.java:79)
   ... 4 more

sanne.grinovero · **Posted:** Mon Apr 05, 2010 3:17 am

thanks for reporting, I think this might be already fixed in trunk relating to HSEARCH-480
could you verify?

Quote:

What's odd is that the process I'm running is inserting (not deleting) records, and from this stack trace it appears that Search is trying to remove entities from the index

I guess the entities you're inserting are having @IndexedEmbedded or @ContainedIn, which as of latest hibernate versions does generate "update collections" events even before the entity is persist, so in that case the identifier is still null and the update operation is mapped to "delete and insert".

jnadler · **Posted:** Mon Apr 05, 2010 7:56 pm

Great, glad it might already be fixed!

I don't see any snapshot builds for search, is there somewhere else I should look or should I just build from source?

Here's where I expected to find them: http://snapshots.jboss.org/maven2/org/h ... te-search/

sanne.grinovero · **Posted:** Tue Apr 06, 2010 2:38 am

no nightly builds are published, you'll have to checkout the sources and build.

this might be useful as it contains the instructions about Maven: http://community.jboss.org/wiki/ContributingtoHibernateSearch

Actually I'm going to ask if we couldn't have the CI publish nightly builds, but that will take some time.

sanne.grinovero · **Posted:** Tue Apr 06, 2010 5:07 am

there's a snapshot at http://snapshots.jboss.org/maven2/org/hibernate/hibernate-search/3.2.0-SNAPSHOT/

this was just manually uploaded, it's not getting updated each night automatically for now.

jnadler · **Posted:** Tue Apr 06, 2010 4:04 pm

This does indeed resolve the problem. And you're right , we are using @IndexedEmbedded (two levels, A embeds B embeds C).

Thanks for your assistance. Hibernate Search is an outstanding product.